2 * Totally braindamaged mbox splitter program.
4 * It just splits a mbox into a list of files: "0001" "0002" ..
5 * so you can process them further from there.
9 #include "string-list.h"
12 static const char git_mailsplit_usage[] =
13 "git mailsplit [-d<prec>] [-f<n>] [-b] -o<directory> [<mbox>|<Maildir>...]";
15 static int is_from_line(const char *line, int len)
19 if (len < 20 || memcmp("From ", line, 5))
22 colon = line + len - 2;
31 if (!isdigit(colon[-4]) ||
32 !isdigit(colon[-2]) ||
33 !isdigit(colon[-1]) ||
34 !isdigit(colon[ 1]) ||
39 if (strtol(colon+3, NULL, 10) <= 90)
42 /* Ok, close enough */
46 static struct strbuf buf = STRBUF_INIT;
49 /* Called with the first line (potentially partial)
50 * already in buf[] -- normally that should begin with
51 * the Unix "From " line. Write it into the specified
54 static int split_one(FILE *mbox, const char *name, int allow_bare)
59 int is_bare = !is_from_line(buf.buf, buf.len);
61 if (is_bare && !allow_bare)
64 fd = open(name, O_WRONLY | O_CREAT | O_EXCL, 0666);
66 die_errno("cannot open output file '%s'", name);
67 output = xfdopen(fd, "w");
69 /* Copy it out, while searching for a line that begins with
70 * "From " and having something that looks like a date format.
73 if (!keep_cr && buf.len > 1 && buf.buf[buf.len-1] == '\n' &&
74 buf.buf[buf.len-2] == '\r') {
75 strbuf_setlen(&buf, buf.len-2);
76 strbuf_addch(&buf, '\n');
79 if (fwrite(buf.buf, 1, buf.len, output) != buf.len)
80 die_errno("cannot write output");
82 if (strbuf_getwholeline(&buf, mbox, '\n')) {
87 die_errno("cannot read mbox");
89 if (!is_bare && is_from_line(buf.buf, buf.len))
90 break; /* done with one message */
99 fprintf(stderr, "corrupt mailbox\n");
103 static int populate_maildir_list(struct string_list *list, const char *path)
108 char *subs[] = { "cur", "new", NULL };
111 for (sub = subs; *sub; ++sub) {
112 snprintf(name, sizeof(name), "%s/%s", path, *sub);
113 if ((dir = opendir(name)) == NULL) {
116 error("cannot opendir %s (%s)", name, strerror(errno));
120 while ((dent = readdir(dir)) != NULL) {
121 if (dent->d_name[0] == '.')
123 snprintf(name, sizeof(name), "%s/%s", *sub, dent->d_name);
124 string_list_insert(name, list);
133 static int split_maildir(const char *maildir, const char *dir,
134 int nr_prec, int skip)
140 struct string_list list = {NULL, 0, 0, 1};
142 if (populate_maildir_list(&list, maildir) < 0)
145 for (i = 0; i < list.nr; i++) {
147 snprintf(file, sizeof(file), "%s/%s", maildir, list.items[i].string);
148 f = fopen(file, "r");
150 error("cannot open mail %s (%s)", file, strerror(errno));
154 if (strbuf_getwholeline(&buf, f, '\n')) {
155 error("cannot read mail %s (%s)", file, strerror(errno));
159 sprintf(name, "%s/%0*d", dir, nr_prec, ++skip);
160 split_one(f, name, 1);
167 string_list_clear(&list, 1);
171 static int split_mbox(const char *file, const char *dir, int allow_bare,
172 int nr_prec, int skip)
178 FILE *f = !strcmp(file, "-") ? stdin : fopen(file, "r");
182 error("cannot open mbox %s", file);
188 } while (isspace(peek));
191 if (strbuf_getwholeline(&buf, f, '\n')) {
192 /* empty stdin is OK */
194 error("cannot read mbox %s", file);
201 sprintf(name, "%s/%0*d", dir, nr_prec, ++skip);
202 file_done = split_one(f, name, allow_bare);
213 int cmd_mailsplit(int argc, const char **argv, const char *prefix)
215 int nr = 0, nr_prec = 4, num = 0;
217 const char *dir = NULL;
219 static const char *stdin_only[] = { "-", NULL };
221 for (argp = argv+1; *argp; argp++) {
222 const char *arg = *argp;
227 if ( arg[1] == 'd' ) {
228 nr_prec = strtol(arg+2, NULL, 10);
229 if (nr_prec < 3 || 10 <= nr_prec)
230 usage(git_mailsplit_usage);
232 } else if ( arg[1] == 'f' ) {
233 nr = strtol(arg+2, NULL, 10);
234 } else if ( arg[1] == 'h' ) {
235 usage(git_mailsplit_usage);
236 } else if ( arg[1] == 'b' && !arg[2] ) {
238 } else if (!strcmp(arg, "--keep-cr")) {
240 } else if ( arg[1] == 'o' && arg[2] ) {
242 } else if ( arg[1] == '-' && !arg[2] ) {
243 argp++; /* -- marks end of options */
246 die("unknown option: %s", arg);
251 /* Backwards compatibility: if no -o specified, accept
252 <mbox> <dir> or just <dir> */
253 switch (argc - (argp-argv)) {
259 stdin_only[0] = argp[0];
264 usage(git_mailsplit_usage);
267 /* New usage: if no more argument, parse stdin */
273 const char *arg = *argp++;
277 if (arg[0] == '-' && arg[1] == 0) {
278 ret = split_mbox(arg, dir, allow_bare, nr_prec, nr);
280 error("cannot split patches from stdin");
288 if (stat(arg, &argstat) == -1) {
289 error("cannot stat %s (%s)", arg, strerror(errno));
293 if (S_ISDIR(argstat.st_mode))
294 ret = split_maildir(arg, dir, nr_prec, nr);
296 ret = split_mbox(arg, dir, allow_bare, nr_prec, nr);
299 error("cannot split patches from %s", arg);